Rik Kabel schrieb am 13.08.18 um 16:28:
> Hans,
>
> That works for the over-simplified case here, but fails in practice. 
> For a \startnarrower[left] paragraph, the mark is still in the main 
> margin, not the 'margin' of the narrowed paragraph. Also, the 
> placement of the text in the margin is wrong and not easily controlled 
> as with \llap and \rlap. The code started out more like:
>
>     \define\Mark{\color[middlegray]{\hskip.6cm\itb¿\ }}
>     \setwidthof{\Mark}\to\MarkWidth
>     ...
>     \starttexdefinition stopBufTest
>       \startluacode
>     buffers.prepend("TestBuffer","\\dontleavehmode\\llap{\\Mark}")
>       \stopluacode
>       \setupnarrower[left=\MarkWidth]
>       \startnarrower[left,right]
>       \startparagraph
>         \inlinebuffer[TestBuffer]
>       \stopparagraph
>       \stopnarrower
>       \egroup
>     \stoptexdefinition
>

Hi Rik,

what do you want to achieve and why do you need a buffer for it?

Wolfgang